I gave my pup frontline..?

Question

a couple of days ago anf I know she had some fleas..

Does it instantly work? Does it automatically kill them and not let ANY come back for a month?

Answer 1

Frontline doesn't kill the adult fleas that are on her or in your house.  It will take a month before the adults die off and you no longer have fleas.

Answer 2

It can take a while to get rid of the existing fleas.  If they are still present after a week I would talk to you vet.  I've had good luck with Frontline in the past.  No flee problem in years.  Give it a little more time.  Good luck.  

Answer 3

It will kill the fleas on the pup in the first day, the problem is that they are still in the yard, bedding etc.  It took about 2 months to completely eradicate them when we moved last year, the yard was loaded and the squirrels kept bringing them in.  Be patient and vacuum often to help cut down the amount in the house and keep up the frontline going, it will work.